
38
References
*2: Surwit, R.S., and Feinglos, M.N.: Diabetes Forecast (1988), April, 49-51.
*3: Sacks, D.B.: “Carbohydrates. “ Burtis, C.A., and Ashwood, E.R.( ed.), Tietz Textbook of
Clinical Chemistry. Philadelphia: W.B. Saunders Company (1994), 959.
You may still have a variation from the result because blood glucose
levels can change signicantly over short periods of time, especially
if you have recently eaten , exercised, taken medication, or
experienced stress*
2
. In addition, if you have eaten recently, the blood
glucose level from a nger prick can be up to 70 mg/dL (3.9 mmol/L
) higher than blood drawn from a vein (venous sample) used for a
lab test*
3
. Therefore, it is best to fast for eight hours before doing
comparison tests. Factors such as the amount of red blood cells
in the blood (a high or low hematocrit) or the loss of body uid
(dehydration) may also cause a meter result to be different from a
laboratory result.
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